retrieve missing articles

Frameworks/Account/FeedWrangler/FeedWranglerAPICaller.swift

@@ -154,6 +154,32 @@ final class FeedWranglerAPICaller: NSObject {
 	}
 	
 	// MARK: FeedItems
+	func retrieveEntries(articleIDs: [String], completion: @escaping (Result<[FeedWranglerFeedItem], Error>) -> Void) {
+		let IDs = articleIDs.joined(separator: ",")
+		let url = FeedWranglerConfig.clientURL
+			.appendingPathComponent("feed_items/get")
+			.appendingQueryItem(URLQueryItem(name: "feed_item_ids", value: IDs))
+		print("\(url!)")
+		
+		guard let callURL = url else {
+			completion(.failure(TransportError.noURL))
+			return
+		}
+		
+		let request = URLRequest(url: callURL, credentials: credentials)
+		
+		transport.send(request: request, resultType: FeedWranglerFeedItemsRequest.self) { result in
+			switch result {
+			case .success(let (_, results)):
+				completion(.success(results?.feedItems ?? []))
+				
+			case .failure(let error):
+				completion(.failure(error))
+			}
+		}
+		
+	}
+	
 	func retrieveFeedItems(page: Int = 0, completion: @escaping (Result<[FeedWranglerFeedItem], Error>) -> Void) {
 		
 		// todo: handle initial sync better

Frameworks/Account/FeedWrangler/FeedWranglerAccountDelegate.swift

@@ -123,7 +123,33 @@ final class FeedWranglerAccountDelegate: AccountDelegate {
 	
 	func refreshMissingArticles(for account: Account, completion: @escaping (() -> Void)) {
 		os_log(.debug, log: log, "Refreshing missing articles...")
-		completion()
+		let group = DispatchGroup()
+		
+		let fetchedArticleIDs = account.fetchArticleIDsForStatusesWithoutArticles()
+		let articleIDs = Array(fetchedArticleIDs)
+		let chunkedArticleIDs = articleIDs.chunked(into: 100)
+		
+		for chunk in chunkedArticleIDs {
+			group.enter()
+			self.caller.retrieveEntries(articleIDs: chunk) { result in
+				switch result {
+				case .success(let entries):
+					self.syncFeedItems(account, entries) {
+						group.leave()
+					}
+				
+				case .failure(let error):
+					os_log(.error, log: self.log, "Refresh missing articles failed: %@", error.localizedDescription)
+					group.leave()
+				}
+			}
+		}
+		
+		group.notify(queue: DispatchQueue.main) {
+			self.refreshProgress.completeTask()
+			os_log(.debug, log: self.log, "Done refreshing missing articles.")
+			completion()
+		}
 	}
 	
 	func sendArticleStatus(for account: Account, completion: @escaping (() -> Void)) {